[Blackbirdws6]

Since I'm assuming you compressed the pistons to get the new pads in the caliper, you are going to have a little slack until the system gets "readjusted". Pistons need to make contact with the pads and then touch the rotor obviously. There isn't a lot of movement that happens when you apply the brakes on a car. Pads are pressed into the rotor when you brake and back off just enough when you let off.

Bottom line, if its working fine and you have no leaks, enjoy the new pads.